Looking for a streamer/DAC

When you say that you want a built in DAC, the output is naturally line level and it is pretty easy to allow for volume control. A good example of this is the Hifi Rose RS150B, but you can keep the output constant and input this to your McIntosh just like any other line level signal. This unit is at the top of your budget and allows for external USB drive and external CD Optical drive for ripping CDs to a USB drive. It also can be a Roon client, but comes with its own streaming ap..you still must sign up for a service. Also, it has balanced outputs, which you can take advantage of with your preamps balanced in. You probably want to look at units like this and pay attention to reports as to how the DAC sounds. You should be able to find all the main players locally.

Just get a separate streamer and DAC (without volume control) and don’t mess with having to bypass a volume control you don’t need anyway since you have an integrated amp.  Combo DAC/streamers are a gamble as both technologies are evolving rapidly and you may very well want to upgrade one and not the other in the future.  FWIW, and best of luck. 

BRYSTON …. stand-alone streamer/ digital player AND paired with its stand-alone stablemate DAC

- read the reviews .

- audition if you can 

=  you won’t be disappointed,

I'd suggest listening to the BlueSound Node as it's a great entry point.  If you are looking for a higher end unit - I'd explore Moon 280D streamer/DAC...

I prefer a streamer/DAC versus separates due to convenience and space. 

Thanks so much for all the helpful responses. I have looked at the Moon, but will check Bryson and others based on your suggestions. 
and I may just start with the Node to begin my streaming experience and upgrade later.